NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2004 Mercedes-Benz SL-Class. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
ACTIVE BODY CONTROL FAILURE ON MERCEDES BENZ SL (MODEL R230) CAUSES THE CAR TO LOWER ALL OF A SUDDEN, LOSS OF CONTROL AND STEERING LOCKING. CAR'S ABC SUSPENSION IS PRESSURIZED, AND IT HAS A HISTORY OF FAILURES. DOCUMENTED ON NHTSA SITE. THE ABC HOSE HAS A RECALL ALREADY, BUT THE ABC PUMP ITSELF CAN GO BAD ANYTIME WITHOUT WARNING. THERE ARE MANY DOCUMENTED CASES, WHICH I HAVE FROM OTHER MERCEDES OWNERS. MINE OCCURRED TRAVELING 35 MPH IN NORTHERN VIRGINIA IN A NEIGHBORHOOD ROAD, AND LUCKILY I PULLED OVER BUT NOTICED MY CAR'S REAR WAS DROPPED 4 INCHES NEARLY TOUCHING THE GROUND. SOME SL OWNERS HAVE BEEN DRIVING AT HIGHWAYS SPEEDS AND SUDDENLY ABC MALFUNCTIONS CAUSING SERIOUS DAMAGE AND POTENTIALLY DEADLY RESULTS IF IMMEDIATE PRECAUTION IS NOT TAKEN. MERCEDES BENZ USA AND IT'S DEALERS ARE WELL AWARE OF ABC ISSUES EFFECTING THEIR LINE OF MODELS INCLUDING: SL, S CLASS, AND CL CLASS. NO RECALLS ON THE ABC PUMP HAS BEEN ISSUED, BUT THE DEALERS POLITELY TELL OWNERS IT'S A KNOWN ISSUE AND IT WILL COSTS $5000.00 TO FIX. THAT'S UNACCEPTABLE. I BEG THE NHTSA TO INVESTIGATE AND IF NEED BE, I CAN GATHER MORE DATA AND FACTS FROM OWNERS AND TESTIMONIALS FOR DEALER SERVICE ADVISORS WHO KNOW OF THIS ISSUE. *TR
THE AUTOMATIC TRANSMISSION FAILED TO UPSHIFT BEYOND THIRD GEAR WHILE DRIVING DOWN HIGHWAY. COULD ONLY GO 30MPH AS REVS HIGH. HAD TO TAKE VEHICLE TO DEALER TO REPAIR TRANSMISSION. ONLY 39,000 MILES ON CAR. NOT ABUSED. *TR
TL*THE CONTACT OWNS A 2004 MERCEDES BENZ SL500. WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKES FAILED. THE CONTACT DROVE THE VEHICLE UP A HILL IN ORDER TO STOP AND THEN PULLED INTO HIS DRIVEWAY. THE DEALER WAS NOTIFIED. THE CURRENT AND FAILURE MILEAGES WERE 3,200.
RECALL CAMPAIGN: RECALL 2004 050014 NOTICE RECEIVED FOR DEFECTIVE SENSOTRONIC BRAKE. *BF THE SERVICE DEALER COMPUTERS DISENGAGED THE CONSUMERS BRAKING SYSTEM, THEREFORE THE VEHICLE WAS INOPERABLE. 2004 MERCEDES BENZ SL500 ROADSTER. *SC *JB
DUE TO DETERIORATION OF THE WIRING HARNESS CONNECTION OR FAILURE OF THE HYDRAULIC PUMP, THE SENSOTRONIC BRAKE CONTROL (SBC) SYSTEM MAY DEFAULT TO THE HYDRAULIC BACK-UP MODE. IN THE BACK-UP MODE, THE DRIVER HAS BRAKING POWER SUFFICIENT TO STOP THE VEHICLE, BUT GREATER BRAKE PEDAL PRESSURE IS REQUIRED AND BRAKE PEDAL TRAVEL WILL BE NOTICEABLY LONGER. DEALERS WILL INSTALL A BRACKET AND REPLACEMENT GROUND WIRE TO THE SBC PUMP UNIT ON ALL AFFECTED VEHICLES. ADDITIONALLY, DEALERS WILL INSPECT AND REPLACE THE SSC PUMP UNIT IN CERTAIN SL MODELS. THE MERCEDES-BENZ RECALL NUMBERS ARE 2005070007 AND 2005110001. RESEARCH SHOWS ONLY 59% OF THE 100% REQUIRED RECALL WAS DONE PROPERLY BY AN AUTHORIZED DEALER. THIS ISSUE WAS NOT DISCLOSED WHEN I PURCHASED THIS CAR AND, THE REQUIRED WORK WAS NOT DONE AND, MERCEDES SAID THE 60 DAYS FROM RECALL HAD PASSED - YET THE REPORTS SENT TO NHTSA BY MERCEDES BENZ APPEARS TO BE FALSE DATA - THIS SHOULD BE INVESTIGATED.
WHEN TURNING ON THE AIR CONDITIONER OR ANY OTHER VEHICLE ACCESSORY THE HEADLIGHTS DIM OR THEY FLASH ON AND OFF AS IF GOING FROM HIGH BEAM TO LOW BEAM, ETC. TECHNICAL SERVICE BULLETIN 040842001A. *AK
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.